Author: SARTENAER, P.
Title: Signification et importance du genre Cyrtiopsis dans les depots famenniens inférieurs. 1. note: Cyrtiopsis murchisoniana (de Verneuil, E., 1845), 2. note: Cyrtiopsis senceliae, nov. sp., 3. note: Cyrtiopsis graciosa, Grabau 1923. [complete in 3 parts]
Description: 1956-57. Bull. Inst. r. Sci. nat. Belg. 32-28, 40 & 33-40; 19+12+14 pp. 1 fig. 3 plts. h.t. Orig. issues from bound volume, part 1 with libr. stamp on title page, otherwise very good.

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